The suspect, Joseph Patterson, has a history of domestic violence charges. He remains jailed on $750,000 cash bond, and has been charged with aggravated assault and aggravated assault on an infant. The district attorney's office is now considering additional charges.

The boy is reported to be Peterson's son via a woman who moved to South Dakota from the Twin Cities a couple of years ago, and Peterson's paternity had been in doubt until a recent paternity test. Police have withheld the child's name, but this afternoon said they would release it next week.